File:National proportion of river monitoring stations in various trend categories for nitrate concentration (%), (1992-2009).png
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National proportion of river monitoring stations in various trend categories for nitrate concentration (%), (1992-2009).
Graph created with data from 1992 - 2009.
Data extracted in November 2012. Most recent data available at:
EEA website WISE-SoE Rivers at: http://www.eea.europa.eu/data-and-maps/data/waterbase-rivers-8
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